static TItem GetItemCore <TItem>(Visual visual, IsMatch <TItem> isMatch, Next <TItem> next)
where TItem : Visual
{
foreach (var element in VisualTreeUtility.GetChildren(visual))
{
Visual o = element;
var item = o as TItem;
if (item != null)
{
if (isMatch(item))
{
return(item);
}
}
else
{
var popup = o as Popup;
if (popup != null)
{
o = popup.Child as Visual;
}
var nextItem = next(o);
if (nextItem != null)
{
return(nextItem);
}
}
}
return(null);
}
/// <summary>
/// GetCoreElement.
/// </summary>
/// <param name="visual">Root.</param>
/// <param name="type">Type.</param>
/// <returns>Match visual.</returns>
public static Visual GetCoreElement(Visual visual, Type type)
{
foreach (var v in VisualTreeUtility.GetChildren(visual))
{
if (type.IsAssignableFrom(v.GetType()))
{
return(v);
}
Visual o = GetCoreElement(v, type);
if (o != null)
{
return(o);
}
}
return(null);
}
/// <summary>
/// FindVisualItem
/// </summary>
/// <typeparam name="T">Param type.</typeparam>
/// <param name="visual">Visual.</param>
/// <param name="param">Param.</param>
/// <param name="isMatchParam">IsMatchParam.</param>
/// <returns>Match object.</returns>
public static object FindVisualItem <T>(Visual visual, T param, IsMatchParam <T> isMatchParam)
{
foreach (var v in VisualTreeUtility.GetChildren(visual))
{
if (isMatchParam(v, param))
{
return(v);
}
object o = FindVisualItem <T>(v, param, isMatchParam);
if (o != null)
{
return(o);
}
}
return(null);
}
/// <summary>
/// Get item text.
/// </summary>
/// <param name="item">Item.</param>
/// <returns>text.</returns>
public static string GetItemText(Visual item)
{
var block = VisualTreeUtility.GetCoreElement(item, typeof(TextBlock)) as TextBlock;
if (block != null)
{
if (!string.IsNullOrEmpty(block.Text))
{
return(block.Text);
}
}
var access = VisualTreeUtility.GetCoreElement(item, typeof(AccessText)) as AccessText;
if (access != null)
{
if (!string.IsNullOrEmpty(access.Text))
{
return(access.Text);
}
}
return(string.Empty);
}
/// <summary>
/// GetChildren
/// </summary>
/// <typeparam name="T">Child item type.</typeparam>
/// <param name="v">visual.</param>
/// <param name="itmes">Children.</param>
public static void GetChildren <T>(Visual v, List <T> itmes)
where T : class
{
foreach (var element in VisualTreeUtility.GetChildren(v))
{
var menuItem = element as T;
if (menuItem != null)
{
itmes.Add(menuItem);
}
else
{
var next = element;
var popup = next as Popup;
if (popup != null)
{
next = popup.Child as Visual;
}
GetChildren(next, itmes);
}
}
}
